Ahmad Carroll was born August 4, 1983 to Artie and Carrolyn Carroll in Atlanta, Georgia. In his earlier years, Ahmad ran track for the D.C. Motion Track Club and also played Pop Warner football. During his years playing Pop Warner football, he earned the nickname "Batman" after repeatedly jumping over an offensive linemen. He later attended Frederick Douglass High School in Atlanta where he was an All-Area cornerback, as well as tailback. Tom Lemming’s Prep Football Report rated Ahmad as the nation’s No. 26 overall player, while Super Prep rated him as the second-best among all the nation’s defensive backs. He was rated the best defensive back in the nation by Prep Star, while Rivals100.com called him the second-best cornerback in the nation. Blue Chip Illustrated rated Ahmad the second-best co rnerback in the nation and the fourth-best overall player in Georgia. He was an ESPN/Reebok All-American selection as he recorded 70 tackles as a senior. He chose to accept a scholarship to the University of Arkansas.

Carroll excelled in two sports at the University of Arkansas as both a sprinter for the track team and a cornerback for the football team. He finished his college football career with the following statistics:

While in high school, Carroll ran track & field for the D.C. Motion Track Club. He set a state record in the 100m dash (10.41 seconds) and finished second in the 200-meter dash (21.24 seconds). He was also the national AAU champion in the 100m dash (10.38 seconds) and was selected to Georgia’s Magnificent Seven list.

As a Arkansas collegiate, he competed on the Razorbacks' track team for two seasons. He earned a pair of All-American honors in the 100m and 200 meters at the 2003 NCAA Outdoor Track and Field Championships.

In 2002, during the indoor season, Carroll competed in the 60-meter dash and set a new UA record with a provisional qualifying time of 6.69 seconds to win the event at the OU Sooner Invitational. He finished 11th (6.77s) at the SEC Indoor Championships. He also competed in the 100-meter dash during the outdoor season. He earned a provisional qualifying time of 10.34 seconds at the SEC Quad and finished third. At the SEC Outdoor Championships, Carroll ran a time of 10.50 seconds in the prelims and just missed advancing to the finals.

In 2003, Carroll competed in the 60-meter dash during the indoor season. A the Tyson Invitational, he broke his own school record with a time of 6.67 seconds. He finished eighth in the event at the SEC Championships. At the NCAA Championships, he ran a time of 6.73 in the prelims, but was unable to advance to the finals. He ran in the 100 and 200-meter dashes during the outdoor season. He came in fourth (10.34s) in the 100 and third (20.94s) in the 200-meter dash at the SEC Championships. At the NCAA Mideast Regional Championships he registered a career-best time of 10.28 seconds in the prelims of the 100m and in the finals he crossed the line in seventh (10.33s). He went on to finish third (20.89s) in the 200-meter dash to earn an automatic berth to the NCAA Championships. He competed in a total of six races in four days at the NCAA Championships and became the first football letterman since Clyde Scott in 1948 to score points in an NCAA outdoor meet. He posted a seventh-place finish (10.46s) in the 100m and was the first Razorback athlete to score points in the 100-meter dash and only the second Razorback athlete to earn All-America honors in the event. He earned his second All-America honor for the weekend when he finished eighth in the 200-meter dash with a time of 21.48 seconds. He was the first Arkansas athlete to earn the honor in both the 100m and 200-meter dashes and was the only sprinter for the week to score points in both events.

Carroll was drafted by the Green Bay Packers in the first round (25th overall) of the 2004 NFL Draft. He was the target by many quarterbacks due to his tendency toward illegal contact penalties. He was nicknamed "Highway 28" in reference to his jersey number and tendency to give up long completions to the opponent. Penalties finally got the best of him when in Week 4 of the 2006 season against the Philadelphia Eagles, Carroll was burned for two costly touchdowns by Greg Lewis and had three penalties. He was cut soon after.

Following the 2008 AFL season, Carroll was signed by the New York Jets. He tried out for the team in 2007 but did not sign a contract.[1] He was re-signed by the team on March 16, 2009.[2] Carroll was waived by the New York Jets on November 16, 2009.

On June 30, 2012, Carroll played in his first CFL game against the Edmonton Eskimos. Midway through the third quarter, Carroll was flagged for defensive pass interference on a deep attempt by Eskimo quarterback Steven Jyles to receiver Fred Stamps. The penalty led to an Edmonton field goal, and Toronto went on to lose the game 19-15.